How to handle serial communication issues on DFPlayer Mini?

Cheng.Ski 2026-01-27 18:11:19 17 Views1 Replies
Why is serial communication unstable or noisy, and how can Arduino control issues be resolved?

2026-01-27 18:11:47

Add a 1kΩ resistor between Arduino TX and DFPlayer RX for signal conditioning.

DFPlayer Mini operates at ~3.3V while many MCUs use 5V; the resistor helps with level compatibility and reduces noise.

Cheng.Ski

Previous Next

DFPlayer - Mini MP3 Player for DIY Arduino / ESP32 Sound Project DFR0299